A roadmap showing Intel's upcoming SSD's has leaked onto the internet. I've attached it below, but here are the details:
X25-E - "Lyndonville" SSDs will be released in Q1 2011 in 100GB, 200GB and 400GB capacities. These drive will use enterprise-grade 25nm MLC NAND flash and feature encryption, S.M.A.R.T. support and enhanced write performance.
X25-M - "Postville" refresh will be released in Q4 2010 in 160GB, 300GB and 600GB capacities. These drive will use 25nm MLC NAND flash and feature encryption, S.M.A.R.T. support and enhanced write performance.
X18-M - Line will be refreshed in Q1 2011. New 160GB and 300GB SSDs will use 25nm MLC NAND flash.
X25-V - Value line will get an 80GB SSD in Q4 2010 and a refreshed 40GB SSD in Q1 2011. Both will use 25nm MLC NAND flash
Intel will also be introducing a new line of Small-Form Factor (SFF) mSATA SSD's at the end of 2010. Available in 40GB and 80GB capacities, these "Soda Creed" SSDs will use 34nm MLC NAND flash.